Diisopinocampheylchloroborane, a Remarkably Efficient Chiral Reducing Agent for Aromatic Prochiral Ketones

Article abstract of DOI:10.1021/jo00225a109

Diisopinocampheylchloroborane, readily prepared in high chemical and optical purities (99percent ee) from (+)-α-pinene (92percent ee) via hydroboration, followed by treatment with dry hydrogen chloride in ether, reduces ketones at convenient rates at -25